.yui-scroll {
  position: relative;
  // 2. 超出的隐藏
  overflow: hidden;
  &-inner {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    overflow: auto;
    &::-webkit-scrollbar {
      display: none;
    }
  }
  &-track {
    position: absolute;
    top: 0;
    right: 0;
    height: 100%;
    width: 10px;
  }
  &-bar {
    position: absolute;
    left: 1px;
    top: 0;
    width: 8px;
    border-radius: 4px;
    background: #ccc;
  }
  &-pulling {
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
  }
}
